US10074305B2 - Pixel, organic light emitting display device including the pixel, and method of driving the pixel - Google Patents

Pixel, organic light emitting display device including the pixel, and method of driving the pixel Download PDF

Info

Publication number
US10074305B2
US10074305B2 US15/232,698 US201615232698A US10074305B2 US 10074305 B2 US10074305 B2 US 10074305B2 US 201615232698 A US201615232698 A US 201615232698A US 10074305 B2 US10074305 B2 US 10074305B2
Authority
US
United States
Prior art keywords
electrode
node
power source
emission control
electrically connected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US15/232,698
Other languages
English (en)
Other versions
US20170061880A1 (en
Inventor
Yang Hwa Choi
Keum Nam Kim
Dong Woo Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Display Co Ltd
Original Assignee
Samsung Display Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Display Co Ltd filed Critical Samsung Display Co Ltd
Assigned to SAMSUNG DISPLAY CO., LTD. reassignment SAMSUNG DISPLAY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHOI, YANG HWA, KIM, DONG WOO, KIM, KEUM NAM
Publication of US20170061880A1 publication Critical patent/US20170061880A1/en
Application granted granted Critical
Publication of US10074305B2 publication Critical patent/US10074305B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0465—Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0819—Several active elements per pixel in active matrix panels used for counteracting undesired variations, e.g. feedback or autozeroing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • G09G2300/0861—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0238—Improving the black level
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements

Definitions

  • An embodiment of the present invention relates to a pixel, an organic light emitting display device including the pixel, and a method of driving the pixel.
  • Such display devices include a liquid crystal display (LCD), a field emission display, a plasma display panel (PDP), and an organic light emitting display device.
  • LCD liquid crystal display
  • PDP plasma display panel
  • organic light emitting display device an organic light emitting display device
  • Embodiments of the present invention relate to a pixel including n-channel type transistors and having a high operation speed, in which a threshold voltage of a driving transistor is internally compensated for by diode-connection, and also relate to an organic light emitting display device including the pixel, and to a method of driving the pixel.
  • a pixel includes an organic light emitting diode including an anode electrode, and a cathode electrode configured to receive a second power source, and a driving circuit configured to supply a current to the organic light emitting diode, the driving circuit including a driving transistor including a gate electrode electrically connected to a first node, a first electrode electrically connected to a second node, and a second electrode electrically connected to the anode electrode of the organic light emitting diode, a first transistor including a gate electrode configured to receive a first emission control signal, a first electrode configured to receive a first power source, and a second electrode electrically connected to the second node, a second transistor including a gate electrode configured to receive a scan signal, a first electrode electrically connected to the second node, and a second electrode electrically connected to the first node, a third transistor including a gate electrode configured to receive the scan signal, a first electrode configured to receive a data voltage, and a second electrode electrically connected to a
  • the driving transistor, and the first, second, third, fourth, and fifth transistors may include n-channel type transistors.
  • a length of the first emission control signal may be substantially equal to a length of the second emission control signal in a frame period, the frame period may include first to seventh periods, the first emission control signal may have a high level in the first, second, third, and seventh periods, and may have a low level in the fourth, fifth, and sixth periods, the second emission control signal may have a high level in the first, sixth, and seventh periods, and may have a low level in the second, third, fourth, and fifth periods, the scan signal may have a high level in the third and fourth periods, and may have a low level in the first, second, fifth, sixth, and seventh periods, and the organic light emitting diode may be configured to emit light in the first, second, and seventh periods.
  • the first, second, third, and fifth transistors may be configured to be turned on, and the fourth transistor may be configured to be turned off, in the third period, and the first node may be configured to receive the first power source in the third period.
  • Vstg represents the difference in the voltage level between the ends of the storage capacitor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • Ids represents the level of the current that flows between the first electrode and the second electrode of the driving transistor
  • k represents a proportional constant
  • Vgs represents a difference in voltage level between the gate electrode and the second electrode of the driving transistor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • An organic light emitting display device includes a display panel, and a display panel driver configured to drive the display panel, the display panel including pixels, m (m is a natural number greater than 1) scan lines configured to transmit scan signals to the pixels, (m+1) emission control lines configured to transmit emission control signals to the pixels, and n (n is a natural number) data lines configured to transmit data voltages to the pixels, wherein the display panel driver includes a data driver configured to generate the data voltages based on received image signals, and a signal driver configured to generate the scan signals and the emission control signals, wherein a pixel of the pixels that is at an ith (i is a natural number less than or equal to m) row includes an organic light emitting diode including an anode electrode, and a cathode electrode configured to receive a second power source, and a driving circuit configured to supply a current to the organic light emitting diode, the driving circuit including a driving transistor including a gate electrode electrically connected to a first node, a
  • a frame period may include first to seventh periods, an ith emission control signal may have a high level in the first, second, third, and seventh periods, and may have a low level in the fourth, fifth, and sixth periods, wherein an (i ⁇ 1)th emission control signal may have a high level in the first, sixth, and seventh periods, and may have a low level in the second, third, fourth, and fifth periods, wherein an ith scan signal may have a high level in the third and fourth periods and has a low level in the first, second, fifth, sixth, and seventh periods, and the organic light emitting diode may be configured to emit light only in the first, second, and seventh periods.
  • Vstg represents the difference in the voltage level between the ends of the storage capacitor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • Ids represents the level of the current that flows between the first electrode and the second electrode of the driving transistor
  • k represents a proportional constant
  • Vgs represents a difference in voltage level between the gate electrode and the second electrode of the driving transistor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • the organic light emitting display device may further include a power source supplier configured to generate the first power source and the initializing power source
  • the display panel may further include first power source lines configured to transmit the first power source to the pixels, and initializing power source lines configured to transmit the initializing power source to the pixels
  • the pixels may be arranged in a first direction, and in a second direction that intersects the first direction, lengths of the emission control signals may be substantially constant in a frame period, the scan lines and the emission control lines may extend in the first direction, the scan signals or the emission control signals may be sequentially supplied in the second direction in the frame period, and the first power source lines and the initializing power source lines may extend in the second direction.
  • a first electrode of the first transistor may be electrically connected to one of the first power source lines, and a pixel adjacent the pixel in the ith row in the first direction may be configured to receive the first power source through the first transistor of the pixel in the ith row.
  • An initializing power source line configured to supply the initializing power source to the pixel in the ith row may be configured to supply the initializing power source to a pixel adjacent the pixel in the ith row in a direction opposite to the first direction.
  • a structure of the pixel in the ith row may be substantially equal to a structure of a pixel adjacent the pixel in the ith row in the second direction, and an emission control line of the emission control lines may be configured to supply the ith emission control signal to the gate electrode of the first transistor of the pixel in the ith row, and may be configured to supply the ith emission control signal to a gate electrode of a fourth transistor of the pixel adjacent the pixel in the ith row in the second direction.
  • a method of driving a pixel including an organic light emitting diode including an anode electrode, and a cathode electrode configured to receive a second power source, and a driving circuit configured to supply a current to the organic light emitting diode
  • the driving circuit including a driving transistor including a gate electrode electrically connected to a first node, a first electrode electrically connected to a second node, and a second electrode electrically connected to the anode electrode of the organic light emitting diode, a first transistor including a gate electrode configured to receive a first emission control signal, a first electrode configured to receive a first power source, and a second electrode electrically connected to the second node, a second transistor including a gate electrode configured to receive a scan signal, a first electrode electrically connected to the second node, and a second electrode electrically connected to the first node, a third transistor including a gate electrode configured to receive the scan signal, a first electrode configured to receive a data voltage, and
  • a length of the first emission control signal may be substantially equal to a length of the second emission control signal in the frame period, and a time at which the first emission control signal starts to be supplied may be later than a time at which the second emission control signal starts to be supplied in the frame period.
  • Vstg represents the difference in voltage level between the ends of the storage capacitor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • Ids represents the level of the current that flows between the first electrode and the second electrode of the driving transistor
  • k represents a proportional constant
  • Vgs represents a difference in voltage level between the gate electrode and the second electrode of the driving transistor
  • Vinit represents a voltage level of the initializing power source
  • Vth represents a threshold voltage of the driving transistor
  • Vdata represents a level of the data voltage
  • a pixel including n-channel type transistors and having a high operation speed, in which a threshold voltage of a driving transistor is internally compensated for by diode-connection, an organic light emitting display device including the pixel, and a method of driving the pixel.
  • FIG. 1 illustrates an organic light emitting display device according to an embodiment of the present invention
  • FIG. 2 illustrates an embodiment of a structure of a pixel in the display panel of FIG. 1 ;
  • FIG. 3 illustrates waveforms of signals supplied to the pixel of FIG. 2 ;
  • FIG. 4 illustrates simulation results in which a threshold voltage is compensated for when the signals of FIG. 3 are supplied to the pixel of FIG. 2 ;
  • FIG. 5 illustrates pixels of the organic light emitting display device of FIG. 1 sharing a transistor and an initializing power source line
  • FIG. 6 illustrates pixels of the organic light emitting display device of FIG. 1 sharing an emission control line.
  • spatially relative terms such as “beneath,” “below,” “lower,” “under,” “above,” “upper,” and the like, may be used herein for ease of explanation to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or in operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “beneath” or “under” other elements or features would then be oriented “above” the other elements or features. Thus, the example terms “below” and “under” can encompass both an orientation of above and below. The device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein should be interpreted accordingly.
  • the term “substantially,” “about,” and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for the inherent deviations in measured or calculated values that would be recognized by those of ordinary skill in the art. Further, the use of “may” when describing embodiments of the present invention refers to “one or more embodiments of the present invention.” As used herein, the terms “use,” “using,” and “used” may be considered synonymous with the terms “utilize,” “utilizing,” and “utilized,” respectively. Also, the term “exemplary” is intended to refer to an example or illustration.
  • the electronic or electric devices and/or any other relevant devices or components according to embodiments of the present invention described herein may be implemented utilizing any suitable hardware, firmware (e.g. an application-specific integrated circuit), software, or a combination of software, firmware, and hardware.
  • the various components of these devices may be formed on one integrated circuit (IC) chip or on separate IC chips.
  • the various components of these devices may be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on one substrate.
  • the various components of these devices may be a process or thread, running on one or more processors, in one or more computing devices, executing computer program instructions and interacting with other system components for performing the various functionalities described herein.
  • the computer program instructions are stored in a memory which may be implemented in a computing device using a standard memory device, such as, for example, a random access memory (RAM).
  • the computer program instructions may also be stored in other non-transitory computer readable media such as, for example, a CD-ROM, flash drive, or the like.
  • a person of skill in the art should recognize that the functionality of various computing devices may be combined or integrated into a single computing device, or the functionality of a particular computing device may be distributed across one or more other computing devices without departing from the spirit and scope of the exemplary embodiments of the present invention.
  • FIG. 1 illustrates an organic light emitting display device according to an embodiment of the present invention.
  • the organic light emitting display device of the present invention includes a display panel 100 , a display panel driver 200 for driving the display panel 100 , and a power source supplier 300 for supplying a first power source ELVDD to the display panel 100 .
  • the display panel 100 includes pixels P( 1 , 1 ) to P(m,n) (m and n are positive integers), scan lines SL 1 to SLm (hereinafter, referred to generically as SL) for transmitting scan signals to the pixels P( 1 , 1 ) to P(m,n) (hereinafter, referred to generically as P), data lines DL 1 to DLn (hereinafter, referred to generically as DL) for transmitting data voltages to the pixels P, emission control lines EL 0 to ELm (hereinafter, referred to generically as EL) for transmitting emission control signals to the pixels P, first power source lines VDDL 2 to VDDLn (hereinafter, referred to generically as VDDL) for transmitting the first power source ELVDD to the pixels P, and initializing power source lines INITL 1 and INITL 3 to INITLn ⁇ 1 (hereinafter, referred to generically as INITL) for transmitting an initializing power source Vinit to the pixels P
  • the pixels P are arranged in a first direction, and in a second direction that intersects the first direction (e.g., are arranged in columns and rows), the scan lines SL and the emission control lines EL may be arranged in the first direction, and the data lines DL may be arranged in the second direction.
  • a pixel P(i,j) (i is a natural number that is less than or equal to m, and j is a natural number that is less than or equal to n) is electrically connected to a scan line SLi, to emission control lines ELi and ELi ⁇ 1, to a data line DLj, and to a first power source line VDDLj.
  • the display panel 100 may further include the first power source lines VDDL for supplying the first power source ELVDD to the pixels P and the initializing power source lines INITL for supplying the initializing power source Vinit to the pixels P.
  • the display panel driver 200 includes a timing controller 220 , a data driver 230 , and a signal driver 240 .
  • the timing controller 220 receives externally supplied image signals RGB and timing signals.
  • the timing signals may include a vertical synchronizing signal Vsync, a horizontal synchronizing signal Hsync, a data enable signal DE, and a dot clock CLK.
  • the timing controller 220 may output the image signals RGB and a data timing control signal DCS to the data driver 230 based on the image signals RGB and the timing signals, and may output a timing control signal CS to the signal driver 240 .
  • the timing control signal CS may include a scan timing control signal and an emission control timing control signal.
  • the data driver 230 latches image data RGB input from the timing controller 220 in response to the data timing control signal DCS.
  • the data driver 230 includes a plurality of source drive ICs.
  • the source drive ICs may be electrically connected to the data lines DL of the display panel 100 by a chip on glass (COG) process or a tape automated bonding (TAB) process.
  • COG chip on glass
  • TAB tape automated bonding
  • the scan driver 240 supplies the scan signals to the scan lines SL and sequentially supplies the emission control signals to the emission control lines EL in response to the timing control signal CS.
  • lengths of sections in which the scan signals are supplied correspond to each other, and lengths of sections in which the emission control signals are supplied may correspond to each other (e.g., lengths of the scan signals may be constant, and lengths of the emission control signals may be constant).
  • the power source supplier 300 generates the first power source ELVDD and the initializing power source Vinit, transmits the first power source ELVDD to the first power source lines VDDL, and may transmits the initializing power source Vinit to the initializing power source lines INITL. According to other embodiments of the present invention, the power source supplier 300 might not generate the initializing power source Vinit.
  • FIG. 2 illustrates an embodiment of a structure of a pixel in the display panel of FIG. 1 .
  • j may be an odd number.
  • the pixel P(i,j) includes an organic light emitting diode (OLED) OLED(i,j) and a driving circuit DC(i,j) for supplying a current to the organic light emitting diode OLED(i,j).
  • the driving circuit DC(i,j) includes a driving transistor DT(i,j), first to fifth transistors T 1 ( i,j ) to T 5 ( i,j ), and a storage capacitor Cstg(i,j).
  • the organic light emitting diode OLED(i,j) includes an anode electrode and a cathode electrode.
  • the driving transistor DT(i,j) and the first to fifth transistors T 1 ( i,j ) to T 5 ( i,j ) may be n-channel type transistors. Because the n-channel type transistors use electrons as a carrier, the n-channel type transistors have a higher response speed when responding to a control signal as compared to p-channel type transistors, which use holes as a carrier. Therefore, the n-channel type transistors are advantageous when used in a large-area display device. The n-channel type transistors are turned on when a high-level voltage is supplied to gate electrodes thereof, and may be turned off when a low-level voltage is supplied to gate electrodes thereof.
  • supply of the scan signals or the emission control signals may indicate that the scan signals or the emission control signals have high-level voltages, while not supplying the scan signals or the emission control signals may indicate that the scan signals or the emission control signals have low-level voltages.
  • the first to fifth transistors T 1 ( i,j ) to T 5 ( i,j ) may be amorphous silicon thin film transistors (a-Si TFT), oxide thin film transistors (oxide TFT), and/or polycrystalline-silicon thin film transistors (poly-Si TFT).
  • the driving transistor DT(i,j) controls a level of a current that flows to the organic light emitting diode OLED(i,j).
  • the level of the current may be determined based on a level of a voltage Vdata supplied to the data line DLj electrically connected to the pixel P(i,j).
  • a gate electrode of the driving transistor DT(i,j) is electrically connected to a first node N 1
  • a first electrode of the driving transistor DT(i,j) is electrically connected to a second node N 2
  • a second electrode of the driving transistor DT(i,j) is electrically connected to the anode electrode of the organic light emitting diode OLED(i,j).
  • the first electrode of the driving transistor DT(i,j) may be one of a source electrode and a drain electrode, and the second electrode of the driving transistor DT(i,j) may be the other of the source electrode and the drain electrode.
  • the first electrode of the driving transistor DT(i,j) is the drain electrode, and the second electrode is the source electrode.
  • the present invention is not limited thereto. That is, whether a first electrode of a transistor is a source electrode or a drain electrode, and whether a second electrode is a source electrode or a drain electrode, may vary. Control by the driving transistor DT(i,j) of the level of the current that flows to the organic light emitting diode OLED(i,j) will be described in detail later.
  • An ith emission control signal Ei is supplied from an ith emission control line ELi to a gate electrode of the first transistor T 1 ( i,j ), the first power source ELVDD is supplied to a first electrode of the first transistor T 1 ( i,j ), and a second electrode of the first transistor T 1 ( i,j ) is electrically connected to the second node N 2 .
  • the first transistor T 1 ( i,j ) is turned on by supply of the ith emission control signal Ei, the first power source ELVDD is supplied to the second node N 2 .
  • An ith scan signal Si is supplied from an ith scan line SLi to a gate electrode of the second transistor T 2 ( i,j ), a first electrode of the second transistor T 2 ( i,j ) is electrically connected to the second node N 2 , and a second electrode of the second transistor T 2 ( i,j ) is electrically connected to the first node N 1 .
  • the driving transistor DT(i,j) is diode-connected.
  • the ith scan signal Si is supplied to a gate electrode of the third transistor T 3 ( i,j ), the data voltage Vdata is supplied from the jth data line DLj to a first electrode of the third transistor T 3 ( i,j ), and a second electrode of the third transistor T 3 ( i,j ) is electrically connected to a third node N 3 .
  • the third transistor T 3 ( i,j ) is turned on by the supply of the ith scan signal Si, the data voltage Vdata is supplied to the third node N 3 .
  • An (i ⁇ 1)th emission control signal Ei ⁇ 1 is supplied from an (i ⁇ 1)th emission control line Eli ⁇ 1 to a gate electrode of the fourth transistor T 4 ( i,j ), a first electrode of the fourth transistor T 4 ( i,j ) is electrically connected to the third node N 3 , a second electrode of the fourth transistor T 4 ( i,j ) is electrically connected to the anode electrode of the organic light emitting diode OLED(i,j).
  • the fourth transistor T 4 ( i,j ) is turned on by supply of the (i ⁇ 1)th emission control signal Ei ⁇ 1
  • the third node N 3 is electrically connected to the anode electrode of the organic light emitting diode OLED(i,j).
  • the ith scan signal Si is supplied to a gate electrode of the fifth transistor T 5 ( i,j ), a first electrode of the fifth transistor T 5 ( i,j ) is electrically connected to the anode electrode of the organic light emitting diode OLED(i,j), and the initializing power source Vinit is supplied from an initializing power source line INITLj to a second electrode of the fifth transistor T 5 ( i,j ).
  • the initializing power source Vinit is supplied to the anode electrode of the organic light emitting diode OLED(i,j).
  • One end of the storage capacitor Cstg(i,j) is electrically connected to the first node N 1 , and the other end of the storage capacitor Cstg(i,j) is electrically connected to the third node N 3 .
  • the storage capacitor Cstg(i,j) maintains a voltage difference between the gate electrode and the second electrode of the driving transistor DT(i,j) when the fourth transistor T 4 ( i,j ) is turned on.
  • the second power source ELVSS is supplied to the cathode electrode of the organic light emitting diode OLED(i,j).
  • a voltage level of the first power source ELVDD is higher than that of the second power source ELVSS, and is higher than that of the initializing power source Vinit.
  • the voltage level of the initializing power source Vinit may be sufficiently low so that the organic light emitting diode OLED(i,j) does not emit light when the initializing power source Vinit is supplied to the anode electrode of the organic light emitting diode OLED(i,j).
  • FIG. 3 illustrates waveforms of signals supplied to the pixel of FIG. 2 .
  • the single frame period “1 Frame” includes first to seventh periods P 1 to P 7 .
  • the frame period 1 Frame may be about 16.6 ms, and may be determined by the vertical synchronizing signal Vsync.
  • the ith emission control signal Ei and the (i ⁇ 1)th emission control signal Ei ⁇ 1 are supplied, and the ith scan signal Si is not supplied.
  • the first and fourth transistors T 1 ( i,j ) and T 4 ( i,j ) are turned on, and the second, third, and fifth transistors T 2 ( i,j ), T 3 ( i,j ), and T 5 ( i,j ) are turned off. Based on a data voltage in a previous frame, the organic light emitting diode OLED(i,j) emits light.
  • the ith emission control signal Ei is supplied, and the ith scan signal Si and the (i ⁇ 1)th emission control signal Ei ⁇ 1 are not supplied.
  • the first transistor T 1 ( i,j ) is turned on, and the second to fifth transistors T 2 ( i,j ) to T 5 ( i,j ) are turned off.
  • the ith scan signal Si and the ith emission control signal Ei are supplied, and the (i ⁇ 1)th emission control signal Ei ⁇ 1 is not supplied.
  • the first, second, third, and fifth transistors T 1 ( i,j ), T 2 ( i,j ), T 3 ( i,j ), and T 5 ( i,j ) are turned on and the fourth transistor T 4 ( i,j ) is turned off. Because the first and second transistors T 1 ( i,j ) and T 2 ( i,j ) are turned on, the first power source ELVDD is supplied to the first node N 1 .
  • the driving transistor DT(i,j) is diode-connected, due to the supply of the first power source ELVDD, voltages of the first node N 1 and the second node N 2 do not change. Because the third transistor T 3 ( i,j ) is turned on, the data voltage Vdata is supplied to the third node N 3 . Because the fifth transistor T 5 ( i,j ) is turned on, the initializing power source Vinit is supplied to the anode electrode of the organic light emitting diode OLED(i,j). That is, the organic light emitting diode OLED(i,j) does not emit light. In the third period P 3 , the first power source ELVDD is supplied to the first node N 1 . That is, the gate electrode of the driving transistor DT(i,j) is initialized by the first power source ELVDD. The third period P 3 corresponds to an initializing process.
  • the ith scan signal Si is supplied, and the (i ⁇ 1)th emission control signal Ei ⁇ 1 and the ith emission control signal Ei are not supplied.
  • the second, third, and fifth transistors T 2 ( i,j ), T 3 ( i,j ), and T 5 ( i,j ) are turned on, and the first and fourth transistors T 1 ( i,j ) and T 4 ( i,j ) are turned off.
  • the first transistor T 1 ( i,j ) is turned off (i.e., the first power source ELVDD is not supplied to the first node N 1 ), and because the second transistor T 2 ( i,j ) is turned on, the driving transistor DT(i,j) is diode-connected, and the voltages of the first node N 1 and the second node N 2 may change. Because the third transistor T 3 ( i,j ) is turned on, the data voltage Vdata is supplied to the third node N 3 . Because the fifth transistor T 5 ( i,j ) is turned on, the initializing power source Vinit is supplied to the anode electrode of the organic light emitting diode OLED(i,j).
  • the organic light emitting diode OLED(i,j) does not emit light.
  • the voltage level of the second node N 2 is the same as that of the first power source ELVDD, and the initializing power source Vinit is supplied to the anode electrode of the organic light emitting diode OLED(i,j). Accordingly, a current flows from the second node N 2 to the anode electrode of the organic light emitting diode OLED(i,j). Due to the flow of the current, the voltage levels of the first node N 1 and the second node N 2 are reduced until the diode-connected driving transistor DT(i,j) is turned off.
  • VN 1 represents the voltage level of the first node N 1
  • Vinit represents the voltage level of the initializing power source Vinit
  • Vth represents the threshold voltage of the driving transistor DT(i,j).
  • a difference in voltage level between the ends of the storage capacitor Cstg(i,j) may be defined by the following EQUATION.
  • Vstg ( V init+ Vth ) ⁇ V data EQUATION 2
  • Vstg represents the difference in voltage level between the ends of the storage capacitor Cstg(i,j)
  • Vinit represents the voltage level of the initializing power source Vinit
  • Vth represents the threshold voltage of the driving transistor DT(i,j)
  • Vdata represents the level of the data voltage Vdata. That is, the difference in voltage level between the both ends of the storage capacitor Cstg(i,j) includes the threshold voltage Vth of the driving transistor DT(I,j).
  • the fourth period P 4 corresponds to a threshold voltage compensating process.
  • the ith scan signal Si, the (i ⁇ 1)th emission control signal Ei ⁇ 1, and the ith emission control signal Ei are not supplied. Because the first to fifth transistors T 1 ( i,j ) to T 5 ( i,j ) are turned off, there is no change, and the difference in voltage level between the ends of the storage capacitor Cstg(i,j) is maintained. Although the initializing power source Vinit is not supplied to the anode electrode of the organic light emitting diode OLED(i,j), because the first transistor T 1 ( i,j ) is turned off, the organic light emitting diode OLED(i,j) does not emit light.
  • the (i ⁇ 1)th emission control signal Ei ⁇ 1 is supplied, and the ith scan signal Si and the ith emission control signal Ei are not supplied.
  • the fourth transistor T 4 ( i,j ) is turned on and the first, second, third, and fifth transistors T 1 ( i,j ), T 2 ( i,j ), T 3 ( i,j ), and T 5 ( i,j ) are turned off.
  • the initializing power source Vinit is not supplied to the anode electrode of the organic light emitting diode OLED(i,j), because the first transistor T 1 ( i,j ) is turned off, the organic light emitting diode OLED(i,j) does not emit light.
  • the third node N 3 is electrically connected to the anode electrode of the organic light emitting diode OLED(i,j). Because the first node N 1 is floated by turning-off of the second transistor T 2 ( i,j ), although the fourth transistor T 4 ( i,j ) is turned on, the difference in voltage level Vstg between the ends of the storage capacitor Cstg(i,j) does not change.
  • a difference in voltage level between the gate electrode and the second electrode of the driving transistor DT(i,j) is equal to the difference in voltage level between the ends of the storage capacitor Cstg(i,j), which may be defined by the EQUATION 2.
  • the (i ⁇ 1)th emission control signal Ei ⁇ 1 and the ith emission control signal Ei are supplied, and the ith scan signal Si is not supplied.
  • the first and fourth transistors T 1 ( i,j ) and T 4 ( i,j ) are turned on, and the second, third, and fifth transistors T 2 ( i,j ), T 3 ( i,j ), and T 5 ( i,j ) are turned off.
  • the first transistor T 1 ( i,j ) is turned on so that the first power source ELVDD is supplied to the second node N 2 .
  • the fifth transistor T 5 ( i,j ) is turned off so that the initializing power source Vinit is not supplied to the anode electrode of the organic light emitting diode OLED(i,j). Therefore, the organic light emitting diode OLED(i,j) emits light again.
  • the level of the current that flows to the organic light emitting diode OLED(i,j) is the same as a level of a current Ids that flows between the first electrode and the second electrode of the driving transistor DT(i,j).
  • Ids represents the level of the current that flows between the first electrode and the second electrode of the driving transistor DT(i,j)
  • k represents a proportional constant
  • Vgs represents the difference in voltage level between the gate electrode and the second electrode of the driving transistor DT(i,j)
  • Vinit represents the voltage level of the initializing power source Vinit
  • Vth represents the threshold voltage of the driving transistor DT(i,j)
  • Vdata represents the level of the data voltage Vdata.
  • the level Ids of the current that flows between the first electrode and the second electrode of the driving transistor DT(i,j) is independent of the threshold voltage Vth of the driving transistor DT(i,j). Because brightness of the light emitted by the organic light emitting diode OLED(i,j) is proportional to the current level Ids, it is possible to confirm that the threshold voltage Vth of the driving transistor DT(i,j) is appropriately compensated for when the pixel P(i,j) is driven.
  • FIG. 4 illustrates simulation results in which a threshold voltage is compensated when the signals of FIG. 3 are supplied to the pixel of FIG. 2 .
  • the case in which the threshold voltage of the driving transistor DT(i,j) is 3V, the case in which the threshold voltage of the driving transistor DT(i,j) is 2V, and the case in which the threshold voltage of the driving transistor DT(i,j) is 1V, will be compared.
  • the (i ⁇ 1)th emission control signal Ei ⁇ 1, the ith emission control signal Ei, and the ith scan signal Si previously described in FIG. 3 are input in the same way in the above three cases.
  • the levels of the data voltage Vdata are the same in the above three cases.
  • the first node N 1 has different voltage levels in the above three cases, and differences in voltage level are maintained in the fifth to seventh periods P 5 to P 7 . That is, in the fourth period P 4 , as defined in the EQUATION 1, it is noted that the voltage VN 1 of the first node N 1 compensates for the threshold voltage Vth.
  • the levels of the current Ids that flows between the first electrode and the second electrode of the driving transistor DT(i,j) are very similar in the above three cases. That is, as defined in the EQUATION 3, it is noted that the level of the current Ids that flows between the first electrode and the second electrode of the driving transistor DT(i,j) is independent of the threshold voltage Vth of the driving transistor DT(i,j).
  • FIG. 5 illustrates that pixels of the organic light emitting display device of FIG. 1 share a transistor and an initializing power source line.
  • pixels P(i,j)′, P(i,j ⁇ 1)′, and P(i,j+1)′ are displayed. Because the pixel P(i,j)′ is the same as the pixel P(i,j) of FIG. 2 , detailed description thereof will not be repeated.
  • a first electrode of a first transistor T 1 ( i,j )′ is electrically connected to a (j+1)th first power source line VDDLj+1′ among the first power source lines VDDL.
  • the first power source ELVDD is supplied to the first electrode of the first transistor T 1 ( i,j )′ of the pixel P(i,j)′.
  • the pixel P(i,j+1)′ is not directly connected to the (j+1)th first power source line VDDLj+1′.
  • the first power source ELVDD is supplied to the pixel P(i,j+1)′ only when the first transistor T 1 ( i,j )′ of the pixel P(i,j)′ is turned on. That is, the pixel P(i,j+1)′ adjacent to the pixel P(i,j)′ in the first direction receives the first power source ELVDD through the first transistor T 1 ( i,j )′ of the pixel P(i,j)′.
  • the display panel 100 having the pixel structure of FIG. 5 may transmit the first power source ELVDD to two driving transistors DT(i,j) and DT(i,j+1) by using the (j+1)th first power source line VDDLj+1′ and the first transistor T 1 ( i,j )′.
  • the first power source ELVDD Emitter-to-dielectric
  • VDDLj+1′ first power source line
  • T 1 ( i,j )′ the first transistor T 1 ( i,j )′.
  • a second electrode of a fifth transistor T 5 ( i,j )′ is electrically connected to a jth initializing power source line INITLj′ among the initializing power source lines.
  • the initializing power source Vinit is supplied to the second electrode of the fifth transistor T 5 ( i,j )′.
  • a second electrode of a fifth transistor T 5 ( i,j ⁇ 1)′ is electrically connected to the jth initializing power source line INITLj′ among the initializing power source lines INITL. That is, the initializing power source line INITLj′ supplying the initializing power source Vinit to the pixel P(i,j)′ also supplies the initializing power source Vinit to the pixel P(i,j ⁇ 1)′ that is adjacent the pixel P(i,j)′ in a direction opposite to the first direction.
  • the display panel 100 having the pixel structure of FIG. 5 may transmit the initializing power source Vinit to two organic light emitting diodes OLED(i,j) and OLED(i,j ⁇ 1) by using the jth initializing power source line INITLj′.
  • the initializing power source lines INITL is reduced in comparison with the case in which the adjacent pixels in the first direction receive the initializing power source by using different initializing power source lines, it is advantageous to implementing a display panel having high resolution.
  • FIG. 6 illustrates that pixels of the organic light emitting display device of FIG. 1 share an emission control line.
  • pixels P(i,j)′′ and P(i+1,j)′′ are displayed. Because the pixel P(i,j)′′ corresponds to the pixel P(i,j) of FIG. 2 , detailed description thereof will not be repeated.
  • the ith emission control signal Ei is supplied to a gate electrode of a first transistor T 1 ( i,j )′′.
  • the ith emission control signal Ei is supplied to a gate electrode of a fourth transistor T 4 ( i +1,j)′′.
  • the emission control line ELi supplying the ith emission control signal Ei to the gate electrode of the first transistor T 1 ( i,j )′′ of the pixel P(i,j)′′ also supplies the ith emission control signal Ei to the gate electrode of the fourth transistor T 4 ( i +1,j)′′ adjacent the pixel P(i,j)′′ in the second direction.
  • the display panel 100 having the pixel structure of FIG. 6 may transmit the ith emission control signal Ei to the gate electrode of the first transistor T 1 ( i,j )′′ of the pixel P(i,j)′′ and the gate electrode of the fourth transistor T 4 ( i +1,j)′′ of the pixel P(i+1,j)′′ by using the ith emission control line ELi.
  • the emission control lines EL is reduced in comparison with the case in which pixels adjacent each other in the second direction receive the emission control signals by using additional emission control lines, it is advantageous to implementing a display panel having high resolution.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US15/232,698 2015-08-27 2016-08-09 Pixel, organic light emitting display device including the pixel, and method of driving the pixel Active US10074305B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020150121004A KR102389343B1 (ko) 2015-08-27 2015-08-27 화소, 화소를 포함하는 유기전계발광 표시장치 및 화소의 구동 방법
KR10-2015-0121004 2015-08-27

Publications (2)

Publication Number Publication Date
US20170061880A1 US20170061880A1 (en) 2017-03-02
US10074305B2 true US10074305B2 (en) 2018-09-11

Family

ID=58096854

Family Applications (1)

Application Number Title Priority Date Filing Date
US15/232,698 Active US10074305B2 (en) 2015-08-27 2016-08-09 Pixel, organic light emitting display device including the pixel, and method of driving the pixel

Country Status (3)

Country Link
US (1) US10074305B2 (ko)
KR (1) KR102389343B1 (ko)
CN (1) CN106486054B (ko)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102665322B1 (ko) 2016-06-24 2024-05-16 삼성디스플레이 주식회사 박막 트랜지스터 기판, 및 표시 장치
CN106782272B (zh) * 2017-01-18 2021-01-15 京东方科技集团股份有限公司 像素电路及其驱动方法、显示装置
CN107346654B (zh) * 2017-08-29 2023-11-28 京东方科技集团股份有限公司 一种像素电路及其驱动方法、显示装置
KR102345423B1 (ko) * 2017-10-31 2021-12-29 엘지디스플레이 주식회사 유기발광표시장치 및 그의 구동방법
KR102542340B1 (ko) 2018-02-26 2023-06-12 삼성디스플레이 주식회사 표시 장치
KR102627270B1 (ko) * 2018-06-05 2024-01-22 엘지디스플레이 주식회사 전계발광 표시장치
CN109074777B (zh) * 2018-07-24 2023-04-28 京东方科技集团股份有限公司 像素驱动电路、方法、以及显示设备
US10964262B1 (en) * 2018-08-30 2021-03-30 Apple Inc. Systems and methods for reducing visual artifacts in displays due to refresh rate
KR102647022B1 (ko) * 2018-12-19 2024-03-14 엘지디스플레이 주식회사 전계발광 표시장치
KR102581375B1 (ko) * 2018-12-31 2023-09-22 삼성디스플레이 주식회사 표시 장치 및 이의 구동 방법
DE112019006661T5 (de) * 2019-01-16 2021-12-09 Sony Semiconductor Solutions Corporation Elektrooptische vorrichtung und elektronisches gerät
CN109584795A (zh) 2019-01-29 2019-04-05 京东方科技集团股份有限公司 像素驱动电路、像素驱动方法和显示装置
CN109817163A (zh) * 2019-03-18 2019-05-28 合肥京东方光电科技有限公司 像素驱动电路和显示面板及其驱动方法、显示装置
TWI731462B (zh) * 2019-11-05 2021-06-21 友達光電股份有限公司 畫素電路、畫素結構與相關的畫素矩陣
CN111028780A (zh) * 2019-12-03 2020-04-17 武汉华星光电半导体显示技术有限公司 Amoled的像素补偿电路
KR102663402B1 (ko) * 2019-12-27 2024-05-08 엘지디스플레이 주식회사 표시 장치
CN115938284A (zh) * 2022-11-11 2023-04-07 武汉天马微电子有限公司 一种显示面板及显示装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7812796B2 (en) 2006-06-27 2010-10-12 Lg. Display Co., Ltd. Pixel circuit of organic light emitting display
US20110157126A1 (en) * 2009-12-31 2011-06-30 Bo-Yong Chung Pixel circuit and organic light emitting diode display device using the same
US20160086546A1 (en) * 2014-09-23 2016-03-24 Lg Display Co., Ltd. Organic light-emitting diode display device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060054603A (ko) * 2004-11-15 2006-05-23 삼성전자주식회사 표시 장치 및 그 구동 방법
KR101202039B1 (ko) * 2006-06-27 2012-11-16 엘지디스플레이 주식회사 유기전계발광표시장치의 화소 회로
KR101030002B1 (ko) * 2009-10-08 2011-04-20 삼성모바일디스플레이주식회사 화소 회로 및 이를 이용한 유기전계발광 표시 장치
KR101797161B1 (ko) * 2010-12-23 2017-11-14 삼성디스플레이 주식회사 화소 및 이를 이용한 유기 발광 표시 장치
CN104167168B (zh) * 2014-06-23 2016-09-07 京东方科技集团股份有限公司 像素电路及其驱动方法和显示装置
CN104465715B (zh) * 2014-12-30 2017-11-07 上海天马有机发光显示技术有限公司 像素电路、驱动方法、显示面板及显示装置
CN104751798B (zh) * 2015-04-10 2016-03-30 京东方科技集团股份有限公司 像素驱动电路、显示装置和像素驱动方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7812796B2 (en) 2006-06-27 2010-10-12 Lg. Display Co., Ltd. Pixel circuit of organic light emitting display
KR101279115B1 (ko) 2006-06-27 2013-06-26 엘지디스플레이 주식회사 유기전계발광표시장치의 화소 회로
US20110157126A1 (en) * 2009-12-31 2011-06-30 Bo-Yong Chung Pixel circuit and organic light emitting diode display device using the same
US20160086546A1 (en) * 2014-09-23 2016-03-24 Lg Display Co., Ltd. Organic light-emitting diode display device

Also Published As

Publication number Publication date
KR20170026763A (ko) 2017-03-09
KR102389343B1 (ko) 2022-04-25
CN106486054B (zh) 2021-01-29
US20170061880A1 (en) 2017-03-02
CN106486054A (zh) 2017-03-08

Similar Documents

Publication Publication Date Title
US10074305B2 (en) Pixel, organic light emitting display device including the pixel, and method of driving the pixel
US10551903B2 (en) Organic light emitting display apparatus
US9858863B2 (en) Pixel, organic light emitting display device including the pixel, and method of driving the pixel
US10515584B2 (en) Organic light emitting display device capable of improving display quality, and method of driving the same
US10692428B2 (en) Organic light-emitting display device and method of driving the same
US9842537B2 (en) Pixel, display device comprising the same and having an initialization period and driving method thereof
US9972242B2 (en) Pixel and organic light emitting display device using the same
US10062323B2 (en) Pixel, organic light emitting display device including the pixel and driving method of organic light emitting display device
US10083655B2 (en) Pixel, method of driving the pixel and organic light-emitting display device including the pixel
US10013914B2 (en) Pixel and organic light emitting display device using the same
US8723764B2 (en) Pixel and organic light emitting display device using the same
US10297205B2 (en) Pixel and organic light emitting display device including the pixel
US9704434B2 (en) Display device and driving method thereof
US8570249B2 (en) Pixel coupled to three horizontal lines and organic light emitting display device using the same
EP3151232A1 (en) Organic light emitting diode (oled) display
US20170116919A1 (en) Pixel circuit and driving method thereof, display device
US20150049126A1 (en) Pixel, pixel driving method, and display device using the same
US10235942B2 (en) Organic light emitting display panel and organic light emitting display device including the same
US9852688B2 (en) Pixel and organic light-emitting display apparatus including the same
EP3349205B1 (en) Pixel and organic light emitting display device using the same
US9230480B2 (en) Organic emitting display device and driving method thereof
US9824628B2 (en) Display device
US20110109598A1 (en) Pixel and organic light emitting display device using the same
CN110969992A (zh) 有机发光显示装置
KR100858613B1 (ko) 유기전계발광 표시장치

Legal Events

Date Code Title Description
AS Assignment

Owner name: SAMSUNG DISPLAY CO., LTD., KOREA, REPUBLIC OF

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CHOI, YANG HWA;KIM, KEUM NAM;KIM, DONG WOO;REEL/FRAME:039479/0829

Effective date: 20160111

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4